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regex capturing the left-hand side of =

From: Peng Yu
Subject: regex capturing the left-hand side of =
Date: Sat, 10 Jul 2021 07:07:50 -0500


I want to capture the left-hand side of =.

Since bash variables can be at the left-hand side of =, it is easy to
be captured this case by a regex like ^[A-Za-z_][A-Za-z0-9_]$.

But it is not easy to capture assignments to elements in arrays or
associative arrays due to the complexity in the suffixes in between

Is there a regex that can capture and only capture all bash code
snippets for the left-hand side of the assignment operator =?


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